No. We do not believe that. Categorically, absolutely not. There is no way to earn God's grace...as a matter of fact the word itself in Latin indicates that it is a free gift...*gratia*.
This from the Council of Trent:
ON JUSTIFICATIONChrist said to the Apostles in John 20: whose sins you forgive are forgiven them, and whose sins you retain are retained. Doesn't that sound to you like He intended God's forgiveness to be mediated through the Church?CANON I.-If any one saith, that man may be justified before God by his own works, whether done through the teaching of human nature, or that of the law, without the grace of God through Jesus Christ; let him be anathema.